API Overview
Contents
API Overview#
The application interface#
Needed to use their windowing system
Talk about the macro DEFINE_APPLICATION_MAIN at the bottom of this file
Defined in the OS project
Not mandatory, possible to use SDL2 or GLFW, but latest game consoles not handled by these libs while they are with TheForge
class IApp
{
public:
// this pair of functions initializes and exits once during start-up and shut-down of the application
// we open and close all the resources that will never change during the live span of an application
// in other words, they are independent from any user changes to the device and quality settings
// typically this is restricted to for example to loading and unloading geometry
virtual bool Init() = 0;
virtual void Exit() = 0;
// this pair of functions loads and unloads everything that need to be re-loaded in case of a device change.
// device changes can come from a user switching from hardware to Warp rendering support or switching on and off MSAA
// and other quality settings
// typically shaders, textures, render targets and buffers are loaded here
virtual bool Load() = 0;
virtual void Unload() = 0;
// this is input / math update -> everything CPU only ... no Graphics API calls
virtual void Update(float deltaTime) = 0;
// only Graphics API draw calls and command buffer generation
virtual void Draw() = 0;
virtual const char* GetName() = 0;
}
Init#
Need to create the renderer